CN202532525U

CN202532525U - High temperature air pre-heater

Info

Publication number: CN202532525U
Application number: CN2012201707853U
Authority: CN
Inventors: 曹立勇
Original assignee: RUZHOU HENGSHENG TECHNOLOGY DEVELOPMENT Co Ltd
Current assignee: RUZHOU HENGSHENG TECHNOLOGY DEVELOPMENT Co Ltd
Priority date: 2012-04-22
Filing date: 2012-04-22
Publication date: 2012-11-14
Anticipated expiration: 2022-04-22

Abstract

Provided is a high temperature air pre-heater. The high temperature air pre-heater is a tubular high temperature air pre-heater and comprises a tube body. The top of the tube body is provided with a smoke outlet, a cold air inlet is arranged on a lower position of the tube body. The lower portion of the tubular high temperature air pre-heater is respectively provided with a hot air outlet and a smoke inlet. The middle of the tube body is provided with a heat exchange section, the inside of the heat exchange section is provided with 38 hot air tubes, and the outside of the heat exchange section is provided with a heat exchange shell. The smoke outlet is communicated with the smoke inlet through the 38 hot air tubes inside the heat exchange section, and the cold air inlet is communicated with the hot air outlet through the heat exchange shell. A thermal insulation layer of the heat exchange shell which is arranged outside the heat exchange section is of three layers, an inner layer is a ceramic fiber felt layer, a middle layer is a rock wool layer, and an outer layer is wrapped by an aluminum sheet or a galvanized sheet. After improvement, preheating temperature of the high temperature air pre-heater can reach 850 DEG C. The high temperature air pre-heater applies to production of carbon black, and can improve a full carbon black yield efficiency greatly, reduce fuel consumption, increase heat values of tail gas and improve accuracy of process operation at the same time.

Description

A kind of high-temperature air preheater

Technical field

The utility model relates to a kind of air preheater, is a kind of high-temperature air preheater specifically.

Background technology

Air preheater is to utilize fume afterheat to improve the equipment of the air themperature that gets into burner hearth.Its operation principle is: a side of heating surface through air, is carried out Re Jiaore through flue gas, opposite side, makes air obtain heating, improves temperature; The flue gas exhaust gas temperature is descended, improve the degree of utilizing of fume afterheat.

Air preheater has following effect: 1, improve and overheavy firing; After getting in the stove through the hot-air behind the preheater, quickened fuel drying, catch fire and combustion process, guarantee smooth combustion in the stove, play improvement, overheavy firing 2, augmentation of heat transfer; Because the stove internal combustion improves and strengthens, add that the hot blast temperature that gets in the stove improves, the mean temperature level also has raising in the stove, thereby can strengthen radiant heat transfer 3 in the stove, reduce the stove internal loss, reduces exhaust gas temperature, improves boiler thermal output.Because the stove internal combustion is stable, the reinforcement of radiant heat exchange can reduce loss of the inadequacy burning for chemistry mechanics reason; On the other hand, air preheater utilizes fume afterheat, has further reduced flue gas loss, therefore, has improved boiler thermal output.Rule of thumb, when air temperature in preheater raises 1.5 ℃ the time, exhaust gas temperature can reduce by 1 ℃.After in boiler flue, air preheater being installed, if can be 150 ~ 160 ℃ of air preheats. just can reduce by 110 ~ 120 ℃ of exhaust gas temperatures, can boiler thermal output be improved 7% ~ 7.5%, capable of saving fuel 11% ~ 12%.4, hot-air can be used as the drier of fuel.For grate furnace, hot-air is arranged, can use the higher fuel of moisture and ash content; For station boiler, hot-air is the important drier and the coal dust pumped (conveying) medium of pulverized coal preparation system.

At present, the employed high-temperature air preheater that is used for production of carbon black on the market, air are gone into the stokehold and are carried out preheating through high temperature air preheating mouth; Its preheat temperature is 650 ℃, and its heat exchanging segment is provided with 42 wind-heat pipes, and reaction heat efficient is low; Fuel consumption is more, and full charcoal yield is also lower.

The utility model content

The utility model provides a kind of high-temperature air preheater to the deficiency of the problems referred to above, and its preheat temperature reaches 850 ℃, improves reaction heat efficient greatly.

A kind of high-temperature air preheater; For the tubular type high-temperature air preheater, comprise body, described body is made up of the exhanst gas outlet at top, the heat exchanging segment at middle part and the smoke inlet of bottom; On heat exchanging segment, be provided with cold air inlet and hot-blast outlet; Heat exchanging segment inside is provided with 38 warm-air pipes, has the gap between per two warm-air pipes, and the outside is provided with the heat exchange housing; Exhanst gas outlet is connected with smoke inlet through the inner warm-air pipe of heat exchanging segment, and cold air inlet and hot-blast outlet are connected through the gap between the warm-air pipe.The heat exchanging segment outside is provided with the heat exchange housing, and the heat-insulation layer of set heat exchange housing is three layers, and nexine is the ceramic fibre carpet veneer, and the intermediate layer is a rock wool layer, the aluminium sheet of outer usefulness or galvanized sheet parcel.

Beneficial effect

A kind of high-temperature air preheater of the utility model, the heat-insulation layer of the outside set heat exchange housing of its heat exchanging segment is two-layer, and outer with aluminium sheet or galvanized sheet parcel, this heat-insulation layer has heat insulation effect preferably, has significantly reduced the heat loss of heat exchanging segment; Heat exchanging segment inside is provided with 38 warm-air pipes in addition, and these warm-air pipes have strengthened the diameter of pipe, and it is the stainless steel of 316L that its material is selected model for use; After improving, its preheat temperature reaches 850 ℃, utilizes this system warm-up can improve reaction heat efficient greatly, is applied to production of carbon black; Can improve full charcoal yield greatly, reduce fuel consumption, in addition because the heat exchange action of hot flue gas and air; Make flue gas descend about 250 ℃, this has just significantly reduced the chilled water (chw) consumption, has reduced exhaust gas volumn; Thereby significantly reduced the area and the fluid transport power that filter, also can improve the tail gas calorific value simultaneously, also improved the accuracy of technological operation; Be applied to produce carbon black, can improve the output of carbon black greatly, guarantee the quality of the product of carbon black.

Description of drawings

Fig. 1 is the high-temperature air preheater front view;

Fig. 2 is the profile of the heat exchange housing of high-temperature air preheater;

Label among the figure: 1 is exhanst gas outlet, and 2 is cold air inlet, and 3 is heat exchanging segment, and 4 is warm-air pipe, and 5 is hot-blast outlet, and 6 is smoke inlet, and 7 are the heat exchange housing, and 8 are the heat exchange inner walls, and 9 is the ceramic fibre carpet veneer, and 10 is thick rock wool layer, and 11 is aluminium sheet or galvanized sheet.

The specific embodiment

Like Fig. 1, shown in 2, a kind of high-temperature air preheater is the tubular type high-temperature air preheater; Comprise body 12; Body 12 is made up of the exhanst gas outlet 1 at top, the heat exchanging segment 3 at middle part and the smoke inlet 6 of bottom, on heat exchanging segment 3, is provided with cold air inlet 2 and hot-blast outlet 5, and heat exchanging segment 3 inside are provided with many warm-air pipes 4; Have the gap between per two warm-air pipes 4, the outside is provided with heat exchange housing 7; Exhanst gas outlet 1 is connected with smoke inlet 6 through heat exchanging segment 3 inner warm-air pipes 4, and cold air inlet 2 and hot-blast outlet 5 are connected through the gap between the warm-air pipe 4.The outside of described heat exchange housing 7 is provided with heat-insulation layer, and this heat-insulation layer is three layers, and nexine is a ceramic fibre carpet veneer 9; Its thickness the best is 100 millimeters, and the intermediate layer is a rock wool layer 10, and its thickness the best is 100 millimeters; The aluminium sheet of outer usefulness or galvanized sheet 11 parcels; Aluminium sheet or galvanized sheet thickness the best are the 0.5-1.0 millimeter, and this heat-insulation layer has heat insulation effect preferably, has significantly reduced the heat loss of heat exchanging segment; 38 warm-air pipes 4 that the inside of heat exchanging segment 3 is set, its material are that model is the stainless steel of 316L, and these warm-air pipes have strengthened the diameter of pipe; Improve the flow velocity when carbon black smoke passes through the warm-air pipe internal diameter, improved the output of carbon black processing, also increased temperature; Reduced energy consumption, the stainless steel that uses 316L in addition is as warm-air pipe 4 materials, and it is corrosion-resistant, high temperature resistant, creep-resistant property is outstanding; Result of use is desirable, and can prolong the service life of warm-air pipe.

Claims

1. high-temperature air preheater; Comprise body (12); It is characterized in that: described body (12) is made up of the exhanst gas outlet (1) at top, the heat exchanging segment (3) at middle part and the smoke inlet (6) of bottom, on heat exchanging segment (3), is provided with cold air inlet (2) and hot-blast outlet (5), and heat exchanging segment (3) inside is provided with many warm-air pipes (4); Have the gap between per two warm-air pipes (4), the outside is provided with heat exchange housing (7); Exhanst gas outlet (1) is connected with smoke inlet (6) through the inner warm-air pipe (4) of heat exchanging segment (3), and cold air inlet (2) and hot-blast outlet (5) are connected through the gap between the warm-air pipe (4).

2. a kind of high-temperature air preheater as claimed in claim 1; It is characterized in that: the heat-insulation layer of the heat exchange housing (7) that its heat exchanging segment (3) is outside set is three layers; Nexine is ceramic fibre carpet veneer (9), and the intermediate layer is rock wool layer (10), and skin is aluminium sheet or galvanized sheet (11).

3. a kind of high-temperature air preheater as claimed in claim 2; It is characterized in that: the heat-insulation layer of the heat exchange housing (7) that heat exchanging segment (3) is outside set; The thickness of nexine ceramic fibre carpet veneer (9) is 100 millimeters; The thickness of intermediate layer rock wool layer (10) is 100 millimeters, and the outermost layer parcel is the 0.5-1.0 millimeter with the thickness of aluminium sheet or galvanized sheet (11).

4. a kind of high-temperature air preheater as claimed in claim 1 is characterized in that: the warm-air pipe (4) that its heat exchanging segment (3) is inner set, its quantity is 38.